And william j



R. J-. HENRY, Jrp, & W. J. K SSL BR.

(No Model.)

AUTOMATIG SHUT-OFF FOR GAS BURNERS.

No. 400,339. PatentedMar. 26, 1889.

allllllll WITNESSES:

INVENTURS. 7/7 fi /r v ATTORNEY;

N PETERS, Phalwl-ilhegvapher. Washington D. C.

UNITED STATES ATENT OFFICE.

REMI J. HENRY, JR, or JERSEY CITY, NEW JERSEY, AND WILLIAM J. KASSLER, or BROOKLYN, NEW YORK.

AUTOMATIC SHUT OFF FOR GAS-'BURNERS.

sPEOI-FIOATION forming part of Letters Patent No. 400,339, dated March 26, 1889-.

' Application filed Jul 28,1887. serial No. 245,563. (No model.)

To all whom it may concern;-

Be it known that we, REMI J. HENRY, Jr, of Jersey City, in the county of Hudson and State of New Jersey, andWILLIAM J KASSLER, of Brooklyn, in. the county of Kings and State of New York, have invented a new and useful Automatic ShutOff for Gas-Burners, of which the following is a specification.

Our invention relates to a device for automatically shutting ofi the flow of gas to gasburners; and the object of our invention is to prevent the escape of gas from the burner when by accident, ignorance, or design the gas is extinguished without closing the stop-cock, or the stop-cock is accidentally or intentionally opened after the extinguishment of the gas.

In the accompanying drawings, Figure 1 represents a gas-burner and our automatic shut-oft applied thereto; Fig. 2, a vertical section of the same, the section being taken on lineococof Fig. l and the figure much enlarged; Fig. 3, a similar view taken on line y y of Fig.

2; Fig. 4, a horizontal section taken on line a z of Fig. 3. Fig. 5 represents in section. a11- other construction of the device.

Referring to the drawings, 13 represents a gas-burner, and F a fixture having a stop cock, 0, for turning the gas on and off in the usual manner.

In the base of'the burner is a cylindrical valve-seat, 1, which is formed by drilling a hole transversely into the burner from one side across the gas-passage p. In the said seat is placed a cylindrical valve, 2, one end of which projects out of the seat and is fitted with an arm, a. The valve is provided with an opening, 3, in line with the gas-passage 19. Preferably this opening-is of a rectangular form.

The valve 2 is automatically opened and closed by the expansion and contraction of a plate, 4, that connects with the valve, and is placed in a position where it is affected by the heat from the flame of the burner. The said plate is by preference composed of two metals of unequal expansibility at the same temperature, so that when exposed to heat the plate will be caused to curve and the free end thereby moved in a certain direction. To gain these objects the plate is composed of a lamina of brass and one of steel soldered together;

but other metals maybe substituted for those mentioned, and a plate of one metal only may be used; but the compound plate is preferred. The plate is curved and shaped in such a manner as to connect by one end with a fixed obj ect and by the Opposite end with a bar which is in pivotal connection with the shut-off valve,while the intermediate portion is in proximity to the flame of the burner. One end is thus left free to move, while the other is immovable. The preferred form of the plate 4 is that of an inverted U, and it is applied to the burner so that the metal which expands the most forms the exterior surface of the plate but in practice the adjustment of the plate with reference to the position of the metals of which it is composed Will depend upon the direction the valve is arranged to move to open the passage to the burner.

The U-shaped plate is placed over the burner-top If, its arched portion being close to and parallel to the plane of the flame, with which it is preferred the plate shall not be in contact. The plate is held in position by fastening the end f of one leg to one side of the burner or other fixed object, and the opposite end, f, by a joint, 5, connected with rod R, which. has its end pivoted to the valve-arm a. The shut-off valve 2 is held closed by the spring-plate 4, as shown in Fig. 1, that being its normalposition. Therefore when the cock is opened the said valve prevents the passage of the gas to the burner-tip; hence there can be no escape of gas after merely opening the cook, but only by opening the shut-off valve, and either holding it open positively or by expanding the plate 4 by means of heat. The valve being positively and permanently connected with the plate 4, it cannot be opened or shut without a movement of the said plate; nor can the latter be moved in the direction it is caused to move by heat without moving at the same time the valve.

As indicated in Fig. 1, the full lines represent the position of the shut-off valve and the plat-e 4 when the gas is not burning, and the broken lines when the gas is burning. To light the gas, the stop-cock O is opened to its fullest extent, thereby admitting the gas to the burner under the valve 2, which remains closed. On applying a light to the tip of the burner the heat therefrom causes the plate 4 to expand and partly open the valve 2, whereupon the gas flows through the valve-opening to the burner-tip and is lighted by the flame applied to the plat-e. The gas-flame now supplies heat, by which the plate is further expanded and the shutoff valve opened to its fullest extent. As long as the gas remains burning the valve is held open; but when it is extinguished the plate immediately contracts and closes the valve.

The utilization of the above-described device to shut oflf the flow of gas automatically after the flame has been extinguished without closing the stop-cock may be readily under stood from the foregoing. If the gas be blown out, for example, the contraction of plate 4 immediately closes valve 2 and shuts off the gas before any injury can result. So, too, if the stop-cock be closed and immediately reopened, accidental or intentional suliiocation by gas escaping from burners may by the use of this device be entirely prevented.

In the modification Fig. 5 the U-shaped plate has both legs of equal length, and the rod R, which is made in two parts, connect-s with the plate at 6, and the joint is formed between the two parts of the rod R. The expansion-plate, rod, and valve are also inclosed by a cylindrical casing, 7, which connects with the base of the burner below the valve. An openingis made in the side of the case, through which a projection from the rod R extends, and terminates with a knob, 70. \Vhen it is desired to light the gas in a great hurry, the vah'e can be opened by pushing on the end of the rod R, or in the incased burner, Fig. 5, in the end of the projection, or the knob k.

\Ve claim- 1. In an automatic shut-oif for gas-burners, the combination, with a gas pipe and burner, of a valve held in a suitable seat in the burner, and provided with an arm or stem, and a U- shaped expansion spring-plate placed over the burner-tip, having one end fixed and the other positively connected with the valvestem, and freely movable therewith at all times to open and close the valve, the construction being such that the valve is kept closed by the spring-plate, whatever the condition of the cock, unless the gas is lighted, substantially as specified.

2. The combination, with the gas pipe and burner, of avalve provided with an arm and held in a suitable seat in the burner, a U- shaped expansion plate placed over the burner-tip and having one end fixed and the other movable, but positively and permanently connected with the arm of the valve, the cylindrical casing 7, inclosing said valve-arm and GXPZLUSlOll-Plittt), and a rod, R, provided with a projection that extends outside of said case through a suitable opening therein, substantially as specified.

In testimony that we claim the foregoing as our invention we have hereunto subscribed our names this 19th day of September, 1888.

REMI J. HENRY, JR. WV. J. KASSLER. In presence of WILTON C. DONN, HARRY ll'oLDnN. 

